To help you and prescribe the remedy, I must make a diagnostic and to do so, I require a report.
1. Open this link and download ZHPDiag2 :
https://nicolascoolman.eu (Don't be alarmed is the site is in French, it sometimes happens, the tool will take your system language and allow the download if you get a warning message, ignore it.) Click on the download button
2. Save the file on your Desktop.
3. Double click on ZHPDiag.exe and follow the installation instructions.
(For Vista, Win 7 and 8 users, click right to ensure you execute with admin right)
4. Double click on the short cut ZHPDiag on your Destktop.
5. If you need to change the language, click on the little house, (bottom right) and change to English