Every time I login to windows I get the "Could not reconnect all network drives” message

Solution 1:

I was able to solve this problem by marking my file server as a trusted local intranet site in Internet Options. Whenever I would copy a file from my share to my computer I would get security warning, and Office would open all documents in read-only mode as if I downloaded them from the internet.

I fixed it by doing this:

1. Open Control Panel, select Network and Internet
2. Click Internet Options and go to the Security Tab
3. Select Local intranet
4. Click the Sites button and then click Advance
5. Add file://<IP address or NetBIOS name of your file server> with no trailing slash.
6. Make sure that "Require server verification (https:) for all sites in this zone" is not checked

Solution 2:

This is a fairly common problem. As this site states:

Whatever the reason, it is commonly reported that mapped network drives appear as ‘disconnected’ in Windows Explorer (or ‘unavailable’ via net use), and that programs that attempt to use these drive mappings will fail until the user physically clicks on the drive letter in Windows Explorer. Only this user-initiated action will restore the connection and allow other programs to successfully read from the drive letter.

So the author of that site wrote a handy utility to solve this problem: MapDrive. If your browse the page, there is a really detailed explanation how to use this program in both elevated and non-elevated states.

This utility solved the above-mentioned problem for me.