I don't know what is wrong with my Computer. It worked without a problem while ago. But then suddenly it runs very slow, already when it boots Windows it takes very long. I have scaned the Computer for Viruses with the Kaspersky Antivirus, but I didn't fin any Virus. Due that I don't think that it is Windows I thought I put the Thread here. When I built together my Computer, I had a problem installing the Fan of my Processor, I'm not sur if that could be the Problem but that is why I posted my Problem here . Thanks for every help I get
C:\scan.html

ok...well need more information on what problems you had with the fan, but i dont think that would have anything to do with the processor. Do you know how to defrag? Also, getting back to your fan, make sure that its directly on the heatsink, otherwise your processor will heat up faster than normal and wont be able to cool down due to the fact that it isnt over the heat sink.

A couple things here. What is the timing of events? That is, when did you build this computer? How long did it work fine? When did it start having problems? Note that a hot CPU will usually cause stability problems (system lockups and reboots) - some CPUs are designed to slow down when hot to prevent damage.

What are your temperatures?

Jakey is right, we need more information. Tell us about your motherboard/CPU. What version of Windows? Did you use TIM when mounting the HSF?

Note too that system slow downs are typical of spyware infestation. Scanning with an AV is good, but you need to use a full arsenal of tools against malware. I recommend you run though Cleaning Out Malware.

i have more to add;

does the computer slow down during certain applications?

These are all the Datas that I have on my PC, well it workes fine over 2 months now, and yeah like about 1 week ago it started running slow, Even when I go to listen to music the sound doesnt come out right. Thx for the Help in advance

The below edited to weed out unnecessary clutter:

OS: XP Professional SP2

Processor: Current Clock Speed 2400
Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz

Memory Reported to Operating System: 3007MB

Disk Drive: SAMSUNG SP2514N, ~233 GB, 3 Partitions

Motherboard: ASUS P5B-Deluxe
Serial Number MB-1234567890
Version Rev 1.xx

BIOS: American Megatrends Inc.
BIOS Date: 08/10/06 14:20:49 Ver: 08.00.12

Video Card: ATI Radeon X1950 Series
Installed Display Drivers ati2dvag.dll
Driver Version 6.14.10.6660
Driver Date 12/17/2006 2:50:30 AM
Video Mode Description 1024 x 768 x 4294967296 colors

As noted, that was more info than we needed so I took the liberty to make it less cluttered.

You still have not answer all questions. Did you use TIM? Have you run through the suggested anti-malware scans? What are your temps? Is it slow for all applications, including music? Or slow just some of the time?