Processor-AMD Athlon 64 X2 DualCore 5600+
MB-Asus M2N-E
RAM-4gb
GCard-Nvidia GeForce 8800GTS 512mb
HD-250gb
Windows 7 64bit
About 2 weeks ago when I entered my password for my desktop the loading screen turned white and my desktop loaded with these generic gray toolbars and dialog boxes and instead of having colored BACKGROUNDS in dialog boxes they are white.  I checked around my system but couldnt find a problem.  Everything has been working so I havent messed with it.  I have had it with the white backgrounds so today I got into system restore to restore it to a pre/problem desktop but there was only one system restore point and it was only 4 days ago which really has me wondering what is going on.  Anyone have any Ideas?  I looked at another desktop on my COMPUTER and it was unaffected by whatever has been messing with my desktop and decided to make another desktop to use so I went to Manage Users and there was a desktop there that I had never seen before called "ASP.Net Machine Acct", they had even password protected it.  I assume it's someone hijacking space on my computer and causing these problems so I DELETED all their files.  I dont know how they did it but that desktop never showed up on the startup screen but was visible on the manage users window.My suspition is that someone DID NOT hack into your computer.

First of all, there are reasons why windows will revert back to the classic theme (it sounds like thats what your describing). Most often this happens because your GRAPHICS card is not good enough to handle the aero theme.

You also mentioned another USER account called "ASP.Net Machine Acct". That account is created by .NET. I don't know why, but I do know that it is not a threat.But what about system restore?  It should have had way more than 1 restore point.