Hi senzab,
"I can't enter my profile. When I try to a Optimzerpc pro window appears. The rest of the screen is black. "
Would you please more details of this issue ?If it is possible ,please post a screenshot here .
When did this issue occur ?Have you installed any software before this issue?
We can try the following steps to have a troubleshoot :
1.Perform a full scan of the system with an antivirus software ,we men need to do this in the safe mode .
Malicious Software Removal Tool
http://www.microsoft.com/security/pc-security/malware-removal.aspx
2.Run the following command to check the health of the system .
"sfc /scannow " or "dism /online /cleanup-image /restorehealth"
3.There is a possibility that the present account profiles has corrupted ,we can create a new account to have a check.
Best regards