When your PC’s CPU usage is high, its performance slows down. In worse cases, high CPU usage can cause your system to freeze or crash. Here are two simple steps that allow you to fix high CPU usage:
- Remove unwanted startup programs
- Click the Windows icon, type msconfig in the Start Search box, and press Enter
- Click the Startup tab in the System Configuration dialog box
- Deselect the process that you do not want to start automatically
- Click Apply to save the changes
- Click OK
- Restart windows
- Run a virus scan
Scan your entire computer for viruses and other malware. Before running a virus scan, update your antivirus software with the latest malware definitions and updates.
hp Drivers For Windows 7 says
So to goo fro 32-bit Vista to 64-bit Windws 7,
you have to back up your data and do a clean install of Windows 7 x64 (just as you would have to do to upgrade from Windows XP).