Windows 7 - Custom theme slows my pc

Hello,

is it normal that a custom theme slows my pc.
Explorer is very slow. My internet seems suddenly extreme slow, when I type something in google, it takes a few second before it apears on screen?

I used this theme www.themeraider.com/2011/09/alienware-theme-for-windows-7.html

Specs
Amd Phenom x4 965BE
Asus M5A99X EVO
HIS HD6870 Ice Q Turbo
Corsair HX750
Corsair XMS 2x2GB

are you sure that it is the theme thats slowing your computer down and nothing else?
have you tried applying back to a normal windows theme and seeing if the same thing happens?

Yes, I dit an system restore and all was back to normal.
I then installed the theme again and there was the slow pc back.
I also tried other themes and they all slowed down my pc.

Themes usually dont make a computer slow. The basic elements of a theme doesnt put any load on the memory. Can you tell us what exactly you are doing while installing a theme ? How have you patched your uxtheme.dll ? Using uxcore or universal themepatcher ?

I followed all the steps provided by the theme, you can see above in the link I posted.
I used UXcore, put the folder Concave in the theme folder and than run a exe file that belongs to the theme.
I also used an extra icon pack (Neon pack 2).

No I even got a message from windows that my system is running slow and that I should not use an aero theme.

what theme are you running now? any Aero theme? or Basic?

I'm still running the customized theme from Alienware.

Is it still slow? right now you are having the custom theme installed, are you still getting errors that your system is running slow and not to use an aero theme?

The error message was yesterday evening and then it was still running slow.
I shut down the pc yesterday when the system was running slow, now i'm at work and havend used my pc yet.

okay. post back after you observe your pc's performance again.