Since re-formatted my laptop [OS: Windows 7 Ultimate, 32 bit], I encountered problems playing Media Player Classic or Media Player Classic Home Cinema. Both S/Ws used to work before but now they didn't work. 2 main problems:

1. Many videos can no longer play with either versions of MPCs or, if they do play, error message says incompatible with Window Aero color scheme and had to change to Window 7 Basic color scheme [not sure what it means]. How to fix it?

2. I used to play multiple videos concurrently [ie. open multiple MPC windows], but now it can only play one video at any one time. [Note: I have set to enable opening multiple MPCs.] Now, when I click to play a second video, the second MPC window either won't play, or play only the sound of the second video but not the video itself.

I am not a technical person, please could some experts give me straight to the point workable solutions to my problems?

Thank you!