Uninstall the game and force a disc install. 1. Launch STEAM and click the ‘My Game’ Tab.
2. Right click on Call of Duty: Black Ops and click ‘Delete local content’. The non-installed information will appear next to the game.
3. Insert Disk 1 into your DVD drive and close Steam (File, Exit).
4. From the Windows Desktop, click on the Start Button, (XP) click Run (Vista) type Run into the Start Search box and choose Run from the list.
In the window Run box enter the following:
c:\program files\steam\steam.exe -install E:
- If your CD/DVD drive is not E: please change it accordingly.
- If Steam is not installed within c:\program files\steam, change the path accordingly.
5. Press OK, Steam should now start the installation from the Disk 1 and will ask for Disk 2 a bit later on.
6. At the end of the installation process, Steam will connect on Internet to download a small update which should take no more than few minutes.
Ссылка на источник: https://activision.custhelp.com/cgi-bin/activision.cfg/php/enduser/std_adp.php?p_faqid=28891&p_created=1288903593&p_sid=WjXncGek&p_accessibility=0&p_redirect=&p_srch=1&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9MiwyJnBfcHJvZHM9MSwxNzQ4JnBfY2F0cz0mcF9wdj0yLjE3NDgmcF9jdj0mcF9zZWFyY2hfdHlwZT1 hbnN3ZXJzLnNlYXJjaF9ubCZwX3BhZ2U9MSZwX3NlYXJjaF90ZXh0PWRpc2M!&p_li=&p_topview=1