Microsoft Offloaded NIC CPU processing which causes Arcserve to fail
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To Fix:
Netsh int ip set chimney DISABLED

To work around this problem, turn off checksum offloading on the network adapter. To do this, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
3. In the right pane, make sure that the DisableTaskOffload registry entry exists. If this entry does not exist, follow these steps to add the entry:
1. On the Edit menu, point to New, and then click DWORD Value.
2. Type DisableTaskOffload, and then press ENTER.
4. Click DisableTaskOffload.
5. On the Edit menu, click Modify.
6. Type 1 in the Value data box, and then press ENTER.
7. Exit Registry Editor