Errors stating c:\ corrupt

Is my c drive shot or can it be fixed? Is it a matter of reinstalling Windows? Is this something a professional should look at to resolve?

When booting up my pc, I receive messages in a User Environment dialog box stating it could not find a profile. Then it states it could not load user profile but logged on with the default profile in the system. Then there is a note that file is corrupt.

A SAS Window winlogon.exe dialog box gives the message - File or directory c:\ is corrupt and unreadable. Run chkdsk utility. When I click OK, a new dialog box comes up

Tgcmd.exe - corrupt file with File or directory c:\ is corrupt and unreadable. Run chkdsk utility. When I click OK, a new dialog box comes up. Once I click on this multiple times a new dialog box comes up

Sprtcmd.exe - corrupt file with File or directory c:\ is corrupt and unreadable. Run chkdsk utility. I click OK multiple times for this and it goes away.

When I run the chkdsk utility, it states it is correcting error in index $I30 for file 5 twice. Then,

Index verification complete

Errors found. Chkdsk cannot continue in read only mode.

Please tell me the best path for resolution.