How to Delete Psapi.dll

Windows Vista or Seven
1. Log-in to the Windows operating system using your administrator password.
2. Click 'Start' and type 'cmd' into the 'Search' box and press 'Enter'. The Command Prompt opens.
3. Type 'regsvr32 /u psapi.dll' (without the quotation marks) into the Command Prompt and press 'Enter'. This will delete the psapi.dll. Note that if you suddenly decide you want to reinstall the psapi.dll, type 'regsvr32 psapi.dll' (without the quotation marks) into the Command Prompt and press 'Enter'.
4. Close the Command Prompt and restart your computer.
Windows XP
5. Log-in to the Windows operating system using your administrator password.
6. Click 'Start' and 'Run'. The Run tool opens.
7. Type 'regsvr32 /u psapi.dll' (without the quotation marks) into the Command Prompt and press 'Enter'. This will delete the psapi.dll. Note that if you suddenly decide you want to reinstall the psapi.dll, type 'regsvr32 psapi.dll' (without the quotation marks) into the Command Prompt and press 'Enter'.
8. Close the Command Prompt and restart your computer.