My friend contacted me ask for help because he is experiencing slow response times and poor video response. I was asked to look at the computer and fix it for him to fix the slow response time in his computer he may need to wipe his computer as there could be virus on his computer and clean out his fans and the inside of his computer. So that the system will not over heat .if the system was to over heat all the time it can damage the fan and other parts of the computer. There also could be virus on his computer so then he would have to wipe computer and delete all the content that he has download if he wanted to keep some of his download he would have to back them up on 2 a USB drive. Also he may need a need new ram as it is always food to have extra memory on your PC also if you add a more updated RAM to your computer; you reduce the number of times your CPU must read data from your hard disk. This usually allows your computer to work considerably faster, as RAM is many times faster than a hard disk. He could also get a new graphic card to help with the gaming lag and the slow video response a good graphic card. You can get a good graphic card at www.Ebuyer.com the graphic card can get worn out after a while so if you want to have good quality when you are gaming you must get a new graphic after a while they cost around 70 pounds up to 200 pounds. There could also be a problem with the CPU in the computer the CPU stands for central processing unit. The CPU is the main part of the computer it is responsible for controlling and executing most of the commands from the computer's hardware and software.