Computer searching or loading problem. Takes forever.

Okay , here is what I got..
basicly , I can't access to my folders (Only through programs and shorcuts that I saved , I can access to those folders like "downloads" ,"My personal files").
This started after my laptop became very slow , I downloaded "CCleaner" and "Avast Free anti-virus" , and deleted few unnecesary programs from the system.
It seems to helped me out with the lags , but windows now loading and loading my folders like..Forever !
When I restart my laptop it works fine for few times , and after few times of opening folders , it starting to load again forever..
Im not a pro with win7 . Could someone pls tell what could be the problem ?


Here is what I see all the time , those magnifying glasses spinning around and around and nothing else.

Okay here is what I got so far...
When I started to get this thing , my computer was lagging , I had antivirus software before the avast . Norton internet security , but I got a feeling that norton was not doing hes job , that why I installed avast , to make sure there was no virus or something.
CCleaner , virus check blah blah blah... nothing worked..
after checking some solutions on the internet and on this forum,
I used that cmd command (with Admin) "sfc /scannow", It's was loading , it was doing something , but no effect.
I defregment C and D disks . nothing .
I try Error-checking on C and D disks . nothing .
But for some misterious reasons , I chaged back to Aero theme (I was using windows Classic them because of lag) , the folders shows up ,and opens them normally .
I downloaded and installed herdProcted , I think he found something , but it was after I got my folders working back normaly .
I'm not sure is this going to problem IS FIXED , but what I know , Im not using windows Classic theme.. atleast for now.

ICit2lol said:

So just how many security programs have you got on the machine? Normally it is advisable to run only one at a time unless it is a main program and one of the on call scanners.

I am asking because programs like Norton for example require the uninstall tool to remove it from the computer.

I know I know , it's only to make sure that norton is working normaly . Know only I need to chose , wich one antivirus to keep..