This problem happens due to customization of visuals in windows xp by some tuning up softwares that fiddles with the default system dll files.But there's nothing to worry.Try these:
To resolve the problem, type these commands from Start, Run dialog:
- regsvr32 jscript.dll
If that does not do, execute the following commands as well.
- regsvr32 nusrmgr.cpl
- regsvr32 /i mshtml.dll
Download it.