Hi Rusalka,
Thank you for posting your query in Microsoft Community.
From your issue description I understand that you want to remove credentials for virtual app.
Credential Manager allows you to store credentials, such as user names and passwords that you use to log on to websites or other computers on a network by storing your credentials.
Windows can automatically log you on to websites or other computers. Virtualapp/Didlogical is a credential that is stored when you use any of the Windows Live products, this can include Windows Live Messenger, Windows Live Mail, Windows Live Sign-In Assisstant,
You may delete the entry from the Credential Manager by following these steps
a. Open Control Panel, click on Credential Manager.
b. Click on the dropdown icon of the entry Virtualapp/Didlogical.
c. Click on Remove from Vault.
For any Windows related assistance in the future, feel free to contact us and we will be glad to help.