Missing ''OPEN & EXPLORE'' options from context menu

[himadri_sm]

ok this might be absurd or rare but after running a virus scan my friends laptop started behaving weirdly..first it was way too slow..while browsing the net the system just hanged & had to be restarted..and now the open,explore & autoplay functions are missing from his dvd drives context menu...this isn't the case with any folder or hdd partition or usb drive..everything else is working fine after the restart..how can the options be brought back?

[Amir.php]

Insert Your windows version CD/DVD in CD-Rom and select the Option "Upgrade".
This May take some time but will restore your all windows missing file.

[hariharakumar]

The DVD might have got some scratches on it, and reading from it might slowed your system and same reason for the context menu items, i think so.

[ravi_9793]

Do full system scam in safe mode.
Tips for Effective system Scanning

And if possible do full system online scan.
Free Online Scanning Service