I tried both and when I tried to repair using the cd there was the option to repair my pc if its having problems starting up and the system restore. I didn't try repairing my pc for startup issues because it starts fine. And I have system restore disabled.
This happens if the patched system files are not compatible with your system (versions, whether it's 32bit or 64bit, Service Packs, etc)
Oh dear, no System Restore...
You should have kept backup copies of the original system .dll files, when you installed the patched versions.
The Visual Styles from DeviantArt need 3 system dlls (shsvcs.dll, themeui.dll, uxtheme.dll) to be replaced by patched versions. You can either do it manually (they recommend you rename the old dlls before you copy the alternative ones into system32, so you can easily restore the originals)
Or you can do it using VistaGlazz, but I've seen a few posts from people where VistaGlazz has gone wrong. It should check carefully for compatability and refuse to install the patches if they don't match, but it doesn't.
Hopefully you can fix it by renaming them in c:\windows\system32 for example:
rename shsvcs.dll to shsvcs.dll.patched
then rename shsvcs.dll.old to shsvcs.dll
and do the same for themeui.dll and uxtheme.dll
then reboot.
However you can only do that if you have the .old versions of course. Otherwise you could find the originals from your Vista DVD, but that's not much use if the DVD is pre-SP1 and your current system has SP1 added.
If you want to go back to standard Aero, you also need to check in the C:\Windows\Resources\Themes folder. The aero.theme file and the Aero folder and all its contents should be the Microsoft originals.
I just looked inside the .rar download for the SoulGlass style you installed. It contains substitutes for Explorer.exe, browseui.dll and imageres.dll. Are these substitutes compatable with your system? The author of this style says it's for Vista but doesn't specify whether it's for SP1, or 32bit vs 64bit.
Again, I hope you kept backup copies of the Microsoft originals before replacing them with these patched versions.
You have learned the hard way:
Never install these amateur patches without first making a restore point or even better save an image of your whole system.