Slow PC after re-install.

[Tumsonis]

I re-installed my computer. It is slower than before with all stuff and viruses.

What could be the problem?

 

[WeRnIE]

Try to use Disc Clean Up, Disc Defragment and Ccleaner and remove not needed stuff from your system.

If it still would be slow, then I think something is wrong with your Windows CD.

 

[Rawrasaurus]

Update your drivers (run windows update to auto-detect the majority of them).

 

[kill dank]

I assumed you reformatted the drives when re-installing, but I always do the long format because it checks for errors in the HD.

 

[Laptop65]

Check for errors and do a defrag if nessessary. I would also recommend installing all the critical Windows updates.

 

[Tumsonis]

I assumed you reformatted the drives when re-installing, but I always do the long format because it checks for errors in the HD.

I did not format anything, I just put in instalation disc and installed windows. Ill try to run disc cleanup and defragmenter.

 

[Rawrasaurus]

Have you tried updating your drivers yet? Run windows update!

 

[Noam]

I did not format anything, I just put in instalation disc and installed windows. Ill try to run disc cleanup and defragmenter.

Format your drives, and reinstall windows again if you have to.
http://www.top-windows-tutorials.com/how-to-reinstall-windows-7.html