Windows 7: C Drive Space keeps decreasing

i seriously cannot understand why the c drive space keeps on decreasing
i have a windows 7 64 bit installed on my laptop and the only major software package installed on it is the adobe cs5 master collection

i use ccleaner and disk clean up regularly and also clean the adobe cache files

but still the space is decreasing just a few weeks back the disk had 77 GB of free space and now its down to 70 -my surfing is a lot and i use any video converter and youtube downloader as well due to my multimedia studies



i cannot understand why is the space decreasing so despite maintenance can anyone help me please

Download and use windrstat. I guess that it is restore points and shadow points.
http://windirstat.info/

hey dear i installed this software but can u help me about the usage of the same please

One thing, when you see a piece with a lot of gb used, just put the cursor (or click) to see what is inside.

The space is probably being used by shadows (restore points) - do the following:

Press Start > right click on Computer > Properties > go to System Protection (on top in the left pane) > highlight C > click on Configure.

What do you see under "Disk Space Usage" > "Current Usage". If that corresponds to the space you are missing, then the space is being used by restore points.

I have a windows 7 64 bit installed on my laptop and i hav'nt installed any big software but disk space is decreasing.sometime free space is 11.5 gb free and sometime it decreases to 9 gb or 8 gb.

i cannot understand why is the space decreasing so despite maintenance can anyone help me please

Hmmmm........

A 100% copy and paste from the OP.

Hmmmmmm........

I have a windows 7 64 bit installed on my laptop and i hav'nt installed any big software but disk space is decreasing.sometime free space is 11.5 gb free and sometime it decreases to 9 gb or 8 gb.

i cannot understand why is the space decreasing so despite maintenance can anyone help me please