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IF double clicking on the V: does not reset the connection, disconnect and remap<br />
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Double check on sys1 that the share is stil shared before hand<br />
net share
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Principal

THURMAN SMITH

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In addition, on each machine, from a command prompt, run:<br />
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Net Use X: /Delete for all drives X. &nbsp;Do this on each machine, restart all machines and try connecting again.
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Rebooted SYS1 again, and its c-drive became accessible again. &nbsp;Saved your pointers for future reference. Thanks.
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Thank you for following up.
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I have 2 Win 7 PCs, &nbsp;SYS1 and SYS2, and one Win 10 &nbsp;(SYS4) on a local network. &nbsp;They have all connected with each other for some while using drive mapping. &nbsp;Recently powered down SYS1 the rebooted a few days later. SYS1 can connect with the other PCs, but neither of the other can connect with SYS1. &nbsp;SYS1 shows on the SYS1/ SYS4 COMPUTER /THIS PC displays, but clicking on the SYS1 icon &nbsp;on both SYS2 and SYS4 generates &quot;device name already in use&quot; &nbsp;message. Suggestion on how to reconnect SYS1 to the other systems would be appreciated.<br />
<a href="https://filedb.experts-exchange.com/incoming/2019/02_w08/1412544/devicena.PNG" target="_blank" class="file-inline" title="Screen image of SYS2 after connect with SYS1 try (91 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>devicena.PNG</a>
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Screen image of SYS2 after connect with SYS1 try

devicena.PNG

I have 2 Win 7 PCs,  SYS1 and SYS2, and one Win 10  (SYS4) on a local network.  They have all connected with each other for some while using drive mapping.  Recently powered down SYS1 the rebooted a few days later. SYS1 can connect with the other PCs, but neither of the other can connect with SYS1.  SYS1 shows on the SYS1/ SYS4 COMPUTER /THIS PC displays, but clicking on the SYS1 icon  on both SYS2 and SYS4 generates "device name already in use"  message. Suggestion on how to reconnect SYS1 to the other systems would be appreciated.

How to reconnect a PC on a local network

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

Windows OS

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.