To resolve this issue,follow the below steps.
1.Close all Internet Explorer windows
2. Run the uninstall utility tool: https://marketplace.microfocus.com/appdelivery/content/alm-client-cleanup-add-in
3. Please navigate to the %Temp% folder. Once in the “Temp” folder delete the “TD_80” subfolder. This is better known as the QC Cache. Like “Temporary Internet Files” this can be safely deleted. It will be recreated upon the next logon to Quality Center.
4. Use right click on Internet Explorer and select “Run as Administrator”
5. In the toolbar select Tools -> Internet Options
6. In the window that opened navigate to tab General
7. Under the section Browsing Settings click the History Button
8. In the window that opened click on the button View Files button
9. Delete all Temporally Internet Files
10. Temporarily disable UAC (User Account Control) and DEP (Data Execution Protection) settings. ALM has many known issues with these settings.
11. Reboot your client machine
12. Right click on Internet Explorer and select “Run as Administrator”
13. Open Quality Center main page (this will start to download the client components from the server)
14. Click on "Tools" page
15. Click on "HP ALM Client Registration"
16. Click on "Register HP ALM”
17. Click on "Tools" page
18. Click on “HP ALM Connectivity”.
19. Download the connectivity add in and install it on the client machine.Now go back and check,that will surely work.