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 ZHPDiag :
http://www.nicolascoolman.fr/download/zhpdiag/ (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, 8 and 10 users, click right to ensure you run with admin right)
4. Double click on the short cut ZHPDiag on your Destktop.
5 Click on scan
Wait for the tool to finished (maybe a long time)