Greetings and salutations fellows! I have been researching on Windows XP Professional Edition operating system from many perspectives from its developers to its users and have not been able to have a rough gauge on its limitations about its figures and numbers according to its maximum value supporting protocols. My question is that “Does Windows XP Professional Edition Service Pack 3 on a P4 2.4 GHz 4 GB RAM with 80 GB PATA HDD {windows installed on PATA Drive} and 2 TB SATA HDD has any limitations on the number of an average of 200 MB softwares or programs that can be installed on the system before it starts to overload or slow down. I know it depends on a lot of factors but I need someone to humor me in a hypothetical situation; just wanted to know how many programs i can install because i use a lot of programs, is there a limit to the number of programs? my desktop is slowing down so i need to know whether it depends on the size of the windows folder or the registry entries. My windows folder is 12 GB and there are no errors or viruses; i have done all of the maintenance and optimization services, but my torrent has suddenly started malfunctioning by giving a definite or absolute memory leak with the hard disk slinging and thrashing. I have Bitdefender Antivirus Pro 2011 installed as well and it is working fine and did not slow down the system before plus i have removed all secondary non-essential programs that run at start up and in windows services. I have also scanned the system using 6 different kinds of antivirus softwares with spywares, firewalls, malwarebytes, removal tools and been monitoring the system using process explorer and hijack this {I uninstalled all of the security suites so now there is just one bitdefender antivirus}, but there is no understanding why the system would slow down, when there are only 40 processes running instead of the usual 90 processes that i used to run before when the system never slowed down. My system has 240 programs installed in it and it was working fine until the torrent started overloading the system; if i pause the torrent the system goes back to a normal state, so my question in technical terms would be: “Does the installing of 240 programs result in the overload of the registry?” The reason i am asking this question is that there is no other possibility as i have fully scanned and tuned the system getting rid of all the garbage and there are no extra processes running except the system processes, so if there is an experienced person out there, you’re help would be greatly acknowledged, thank you very much and farewell.

The maximum number of files you can have on a single disk or in a single folder is over 4 billion (with NTFS formatting). There is no limit to the file size. And the number of files saved to your disk has nothing to do with Windows performance (assuming there is still sufficient free disk space available for Windows to operate in). What matters is how many programs you are loading at startup and thereafter - but even then, that is more of a RAM issue.

Most likely you infected your system with your use of torrents - a major source/method of distribution for malware. While you may have removed any malware, malware removal does not repair any collateral damage the malware, or the removal process, may have caused. A system repair, SFC /scannow, or even a full reinstall maybe needed.

if i pause the torrent the system goes back to a normal state

To me, that points to the torrent and my recommendation is to uninstall it and don't reinstall it. While torrent technologies are perfectly legal, it is estimated 95% up to 99.9% of all torrent users use it to download copyrighted materials without due compensation - that is, to steal songs, videos, and other copyrighted materials. And because of those percentages, badguys see torrents (and P2P sites too) as a perfect solution to their malware distribution problems. Therefore, I recommend you find another method for downloading.

Originally Posted by Digerati

..... the number of files saved to your disk has nothing to do with Windows performance (assuming there is still sufficient free disk space available for Windows to operate in). What matters is how many programs you are loading at startup and thereafter - but even then, that is more of a RAM issue.

Digerati is right - it's a common misconception that the number of files on a hard drive slows Windows down. If I had £1 for every time that a customer had said that their PC was running very slow and so they wanted to move all of their photos onto a USB hard drive, I'd be a rich man. But it makes no difference.

What does make a difference is how many processes are running and, consequently, how much RAM is being used and how busy the hard drive and processor are. A Pentium 4 processor is not the basis for a performance PC these days but the fact that you've only got about 40 background processes running is good. A well-tuned Windows XP system should use less than 400MB RAM at startup and less than 1GB when typical programs are open - you should usually only need more than that if you are running specific memory-intensive applications such as CAD or Photoshop.

However, I would expect even a 'lean and efficient' Windows XP environment to struggle with having 240 applications installed. That's almost too much to even imagine. The registry must be HUGE! Whilst I can't give you any specific experience to back that opinion up, I've supported many hundreds of different Windows XP systems in homes, small businesses and enterprises since it was first released and I know that, even when you uninstall programs or reduce the number of 'startup' entries to minimise the number of running processes, sometimes you just can't get XP back to being as efficient as it was when you first installed it. Sometimes, only a format and re-install will give you the performance that you need, particularly on systems with older processors such as Pentium 4s. I would expect that your registry is clogged up, resulting in Windows taking a long time to search through it to find the entries that it needs to operate and run programs. You should look into that.

I'm also shocked that you've said that your Windows folder is 12GB. I'm writing this on my Windows XP Professional SP3 netbook which has a 5.5GB Windows folder, which is much more typical. You ought to try to identify why your Windows folder is bigger, i.e. which sub-folders contain the extra files. The most obvious place to start is \Windows\Temp as that just contains temporary files so you can usually reboot the PC and then empty out all of the leftover contents in \Windows\Temp. There are lots of free utilities that can scan drives/folders to list the size of sub-folders within them - I like TreeSize Pro.

Lastly, I'm also not surprised that you're having issues if you're using torrent applications. And that opinion definitely IS based on specific experience! As Digerati said, the use of torrent software itself may not be illegal but whatever it is that you are downloading can give you all kinds of problems.

As you have 4GB RAM, you should consider downloading and installing Microsoft Virtual PC (which is free) in order to create a "virtual machine" on your computer. You could use that either for your every-day usage (with minimal programs installed in order to remain efficient) or move all of your surplus applications that you do not regularly use into the virtual machine.