If you already see CrashPlanService listed there, it means it should work; however, I suggest removing it and then re-adding it, as well as other CrashPlan executable files. Here is how to do it:
1. Exit CrashPlan
2. Un-hide hidden files and folders. To do that, open any folder and then click on Organize shown in the upper left corner, and then click on Folder and search options. When the Folder Options window opens, click on the View tab. There select Show hidden files, folders, and drives. Click OK to save the changes
3. Start Windows Firewall. Click on Allow a program or feature through Windows Firewall located on the left pane
4. Click on the Change settings button at the top so that you can make the changes. If the button is grayed out, it means you can already make the changes
5. Locate all items mentioning CrashPlan and remove them from the list by clicking on the Remove button
6. Click on the Allow another program... button located at the bottom
7. When the Add a program window opens, do not select any of the CrashPlan items that may appear, but instead, click on the Browse... button
8. Now point to the CrashPlan installation folder. By default it is:
Computer > Local Disk (C:) > Users > [your user name] > AppData > Local > Programs > CrashPlan
9. Select CrashPlanService and then click Add to add it to the list of allowed programs. Check all check-boxes for it to allow it to fully work on all Windows Firewall profiles (networks)
10. Do the same for other two CrashPlan executable files, named CrashPlanDesktop and CrashPlanTray
11. When done, the list of allowed programs should show 3 CrashPlan items:
- CrashPlan backup engine which backs up your files!
Click OK and start the CrashPlan program to see if it can fully work now
Let me know the results.