fix computer errors

I have recently got some problem with my computer. I have lost the stability of the computer.
I cant open pictures file as my WINDOWS PICTURE & FAX VIEWER doesn’t open. Moreover, I can’t paste anything anywhere. Although I can copy or cut but while pasting my explorer shows NOT RESPONDING. And my desktop shows ACTIVE DESKTOP RECOVERY Screen.
When I run MEDIA PLAYER CLASSIC, I get the following error. MICROSOFT VISUAL C++ RUNTIME LIBRARY (R6002)-floating point not loaded.
I also can’t run FILEMON.EXE
My computer doesn’t goto SAFE MODE. After loading MUP.SYS, it restart again with error COMPUTER CANT BE STARTED DUE TO POWER FAILURE OR OTHER PROBLEMS.
I currently have been infected my IPH.EXE but I manually deleted it myself.
Ever after re-installing new windows XP by formating C:, still I have same problem. My be becaure I run other drive after it as my documents, programs, drivers are all in other drive.
I cant install some programs as it shows MICROSOFT INSTALLER ERROR. And to antivirus. Not of them got installed. Although, Kaspersky 7.0 and AVG got installed but both didn’t run. It got closed before installation process was completed.
So please help.