drive c shows red mark almost drive full

100 Gb for OS,

it should not take that much space.. check it out which file has taken maximum space. that can be check using search option

search using *.* and then sort it by size, let search result get complete.

2) delete temp file

go to the command prompt and type in below command

delete *.tmp /s

3) Change paging file location

http://www.howtogeek.com/173713/6-ways-to-free-up-hard-drive-space-used-by-windows-system-files/

http://alloraconsulting.com/it-solutions/76-windows-server-2008-low-space

You can get a free utility such as SpaceMonger that will analyze and show you a graphical representation of where the space is being consumed.
http://download.cnet.com/SpaceMonger/3000-2248_4-10050288.html

It is possible your C: drive is full, especially because your Users profiles are all located their (My Docs, Pics, Videos, etc.)

sanjeevkmrs--
Have you scanned with your antivirus and MalwareBytes?

Run a Disk Cleanup
http://www.sevenforums.com/tutorials/818-disk-cleanup-open-use.html

You can use Tree size free version to identify which occupied the space.
This is nice tool and will help you.

Tree Size Download link
https://www.jam-software.com/treesize_free/

Please try to restart Volume Shadow Service once and check the space

@McKnife.

I am Sorry dear i did not seen your comments about tree size else i would not post mine. Its just matter of some second we posted the comments one after another..

If your user profile data is stored on the C: drive (it is by default) then it's not surprising to see that your C: drive is filling up quickly.  You can move all your user data to the D: drive quite easily.

Open your user directory i.e.: C:\Users\<Your Name> and select all the folders inside it.
Right Mouse-Click and select "Cut"
Navigate to the D: drive (or a folder on the D: drive like "My Data")
Right Mouse-Click in the white space and select "Paste"

Depending on the amount of data that has to be moved, this process may take awhile.

Once completed, you will have regained the space on your C: drive, all new data -should- now save to the D: drive, and you can still access all your data easily through your user library.

@protech - "all new data -should- now save to the D: drive"???

Example:  

You create a new Wordpad document and then choose "Save" from the file menu.  

By default, the document would save in the Libraries/Documents folder.

After cutting and pasting the folders as described above, this folder physically resides at D:/Documents (rather than C:/Users/<Your Name>/Documents)

This happens for each folder you cut and paste from the C:\Users\<Your Name> folder to the D: drive.  Downloads, Music, Pictures,...even Desktop.

How does the system know this has happened?

hi I have checked all users profiles in the pc too no data is there

thanks