1. When did this start happening?
2. Have you made any recent changes? Added new software, changed or added new hardware?
3. Please post a Speccy
Download Speccy 1.16.317 - FileHippo.com
4. Please show us what programs are installed on your system.
Please do the following;
Click on start and type msinfo32 and press enter. This should open the “system information”
To look at the programs installed on the computer navigate under “System summary” click on “Software environment” and later click on “program groups” now on the right pane you would see the list of programs installed on the computer. Please make sure you separate the tabs enough to see items under group name and name.
Now you will need to highlight the entire list copy and paste it back here.
5. Upload a screen shot from RESMON when the problem is occurring.
Please do the following;
In your search field, type RESMON
Press enter. Allow RESMON to run while you perform tasks. Duplicate your problem, then go back to RESMON and maximize the CPU tab to fill the screen. After doing so, SNIP it and post back.
6. What anti virus are you running?
7. Please install
http://www.malwarebytes.org/products/malwarebytes_free(the free one)and run a full scan on all user accounts.