hi frendz
i cannt open Computer Management. i 've used both methods : Mycomputer / right click / manage and start / run / compmgmt.msc.
but i couldn’t able to open computer management. Can any one fix my problem.
Welcome to HWF 
Go to Control Panel > Administrative tools > Computer Management
Most likely a restriction, make sure you are logged on as an administrator.
hai
there is no chance to restrict it, becouse its single user pc.
i logged on as administrator. even i cant open computer management.
computer management is a MMC snap-in. Run > MMC > add computer management snap-in.
by the way - what OS are you using?
Do a full scan for spyware and adware and viruses then. Something may be preventing you from accessing it.
Be more specific, what is happening? Are you getting an error message?..Is it just not showing up?..