I have deleted some unwanted scheduled tasks (The programs that can't be installed due to compatibility issues) through C-Cleaner.
But, I ran into severe problem after that.
My appearance of Windows 7 goes rough with some lines (like Classic View).
Please take time to read these threads,
Then, I scan my Registry with C-Cleaner recently.
It shows 31 issues.
But, this time, the issue seems to be on system files!
I fear to fix whether they may lead to system unstability!
Please see the threads help me with the issue!