How long since you used canned air to clean the vents?
Have a Lenovo laptop Windows 7, 2 years old. Few days ago,the screen started flashing on and off quickly. Couldn't use mouse to shut down, so pressed the start button for a forced shutdown. Now, computer runs slower, icons on desktop have arrows in them, and programs aren't operating normally..no ribbon in word or powerpoint, etc.
The cursor won't even open the Start button. The "time" is gone from bottom right taskbar. It's like it's operating is in a weird safe mode. Any ideas?!