User blog:Grizzly Bear/Computer Problem- Help Needed

Alright. So as of last night, my computer seems to have a problem. The "Windows Explorer" file is corrupted, according to notifications I am receiving, although at the current time my computer still appears to be fully functional. The only difference I have noticed is a slight decline in performance speed, particularly when I am waching YouTube and speaking in chat at the same time. My files are all still accessible.

1. What Is Not Working:

 * My system appears unable to perform a restore. I have attempted several times and I cannot get past a window that states my disk cannot be checked while it is running.
 * Malwarebytes and AVG have detected no threats with several scans in the past few days.
 * My computer froze before this problem was revealed.

2. What Might Have Caused The Problem?
I do not know where this problem has arisen from. I have not been doing any new or potentially troublesome activities as of late. Aside from this website, YouTube, deviantArt, IRC, FictionPress, Fanfiction, Quotev and Wikipedia, I use few other websites infrequently.

Aside from pictures and links in main, I have downloaded nothing in the past several months.

3. Will it get any worse?
That is what I am asking you all. If you know about this problem or have experienced it in the past, 'please let me know what I can expect. '

4. How can I fix this?
Again, please, let me know.

5. Information on my laptop
An Acer running Windows 7. Two years old. Used every day.

Antivirus programs used are AVG and Malwarebytes.

Frequently used programs: Skype, Firefox, ReadPlease 2003, Microsoft Word, Paint, Windows Media Player