Lately my computer has been displaying explorer.exe application errors like "'0x02ea6041' referenced memory at '0x02ea6041'. The memory could not be 'read'." randomly when I start programs such as firefox. Every time I have to manually start explorer.exe and there are always a few icons missing from the tray though their processes are still running. I was wondering why this is happening. I scanned with Zonelabs Antivirus, Ewido, A-Squared, Spybot, and Microsoft Defender. This might not be a virus. Does anyone know why this is happening?

Also, I searched on Yahoo, so please, no "search Google" BS.