On an initial trial of inSSIDer, I find it displays erratic RSSI data from a RealTek WNA1100 USB wireless adapter, on a PC running 64-bit Windows 7. The RSSI often jumps to very high level signals (-10 dBm indicated) on channels that are down in the noise (-95 dBm).
The PC is dual boot. On the alternate boot (32-bit Windows XP) and the same USB adapter, inSSIDer seems to work fine.
The 64-bit issue wasn't affected by updating to the latest 64-bit RealTek driver, or by trying an older 64-bit version of inSSIDer rather than 32-bit inSSIDer 2.1.
Can you suggest a fix? Attached is a 64-bit time plot showing the problem.