It sounds like you may have a overheating problem. Purchase a canned duster and blow out the insides via the intake vent and exhaust vent.
Before you blow out the insides please do the following. This should be done after the computer has been running for ~10 minutes so the temperatures reflect a normal operating temperature.
Please download and install Speccy
to provide us with information about your computer. Clicking on this link will automatically initiate the download.
This is a Zip file, you will need a program like Zip
to extract the program.
When you have downloaded the Speccy Snapshot you will need to extract the program. In order to do this click on Extract all as seen in the image below.
After extracting the program you will be prompted to Select a Destination and Extract Files. You can change the location suggested or choose another location. After you have decided on the location click on Extract.
In the page that opens you will see two Applications. The first is for a 32-bit operating system, the second is for a 64-bit operating system. Click on the version which applies to your operating system. This will open the Speccy Snapshot.
When Speccy opens you will see a screen similar to the one below.
Click on File which is outlined in red in the screen above, and then click on Publish Snapshot.
The following screen will appear, click on Yes.
The following screen will appear, click on Copy to Clipboard.
In your next post right click inside the Reply to Topic box, then click on Paste. This will load a link to the Speccy log.