Changed the screen resolution to 1024*768. Not following this, but I'm going with it. Didn't make a difference, but hey, I'll try anything at this point.
Here's the processes running with the POS software running. They are in order from the list, listed here left to right. There's a bunch.
Simptcp SamSs Power PlugPlay DcomLaunch hpqddsvc hpqcxs08
HPSLPSVC WinHttpAutoProxySvc WdiServiceHost nsi netprofm
EventSystem SSDPSRV FontCache FDResPub wscsvc lmhosts
eventlog Dhcp Audiosrv MpsSvc DPS BFE wudfsvc WdiSystemHost
UxSms TrlcWks SysMain PcaSvc Netman hidserv CscService
AudioEndpointBuilder Wsearch WMPNetworkSvc wlidsvc TrustedInstaller
STacSV Spooler QBVSS QBCFMonitorService PML Driver HPZ12
NisSrv Net Driver HPZ12 MsMpSvc MDM BBUpdate BBSvc wuauserv
Winmgmt Themes ShellHWDetection SENS Schedule ProfSvc
LanmanServer iphlpsvc IKEEXT gpsvc Browser BITS AeLookupSvc
NlaSvc LanmanWorkstation Dnscache CryptSvc Policy Agent RpcSs
I hope this turns out for you. There is an approximate tab space between each service as I have it listed, again line by line left to right. Some of the service names have a single space between the words but that is one service.
I was also running Microsoft Security Essentials and/or Windows Defender because I do not have a virus software on this machine. It doesn't spend much time on the internet, so I chose to use that for now. I disabled all of that and rebooted this morning on the off-hand chance that was my interruption, and that didn't change anything either. As I said, I'm done. But, I'll wait for you reply.