Okay really need your help here and follow the directions, if your not taking it to a professional.
1) www.filehippo.com Download and run Speccy give us your full system specs. Also the Temps listed would help to see what your like 'idle'
2) Download and run SlimDrivers, to make sure you have all the latest drivers
3) Keep running Windows Update till all updates are completed
4) Run MSCONFIG from the Orb and disable all non needed apps from startup (i.e. do you need ADOBE to LOAD on the computer when you don't use it? No, you don't).
5) What is your Power (PSU) model / output?
6) Start computer up, when white text on black screen, hit the KEY it says to access BIOS. Disable integrated graphics, and test again, make sure your trying SINGLE PLAYER MODE
7) If still no difference, reboot computer and turn on the intergrated graphics. Shut down PC, remove GPU (graphics card). Plug video into onboard (integrated) video. Power on, and test games do they run now? If YES, potentially your GPU is failing / broken.
8) If no still no difference shut down, replug in GPU, startup, BIOS, disable integrated graphics. Download both HDTune to run and test your Hard Drive, then download and run Memtest86. Do you get errors on either?
9) If no then from the ORB run Windows Easy Transfer and backup all your personal data to a external drive. Download and use DBAN to wipe the drives, then reload Windows, the drivers then the apps / games. DO NOT RESTORE your data just patch and get the Windows fully updated, then run the Games and see if they work. If they still don't work, we are looking at the Mobo/CPU has a problem for high end video.
BTW is this underwarranty? If so why not contact the maker and use them?