Painter 2020 crashes on launch - tried previous answers to no avail


I upgrade Painter 2018. I have copies of both 2020 & 2019, both crash on launch - tried reboot to factory settings to no avail.

I am on windows 7 and computer specs are above recommendation. I use Wacom Intuos tablet

Can anyone help

1. tried reboot to factory settings to no avail.
2. remove Wacom tablet from system, rebooted, cleaned registry, used mouse
3. looked for conflicts with display card
3. remove Painter 2020 3 times, rebooted, cleaned registry, reinstalled
4. used repair in installation 4 time
5. change screen reolution from default ( 2560 x 144)  to 1920x1080 and lower resolution

I have no other version of Painter installed


BenQ PV270 27" Monitor running 2560 x 1440 resolution true Color (32 bit), 59 hertz
with X-Rite i1Display Pro

Graphics card memory 1696 MB

OS name:  Microsoft Windows 7 Professional
Version:    6.1.7601 Service Pack 1 Build 7601
System Manufacturer:  GIGAByte
System Model:   MMLP7AP-000
System Type:     x64-based PC
Processor:    Intel(R) Core(TM) i7-4500U CPU @ 1.80GHz, 2401 Mhz, 2 Core(s), 4 Logical Processor(s)
BIOS Version/Date:    American Megatrends Inc. F5, 19/02/2014
SMBIOS Version:    2.7
Installed Physical Memory (RAM)    8.00 GB
Total Physical Memory    7.92 GB
Available Physical Memory    2.89 GB
Total Virtual Memory    15.8 GB
Available Virtual Memory    10.3 GB
Page File Space    7.92 GB

loads and then crashes on black window
  Fault Module Version:    6.1.7601.18015
  Fault Module Timestamp:    50b8479b
  Exception Code:    c06d007e
  Exception Offset:    0000000000009e5d
  OS Version:    6.1.7601.
  Locale ID:    3081
  Additional Information 1:    7283
  Additional Information 2:    72836eb6216b49be15302fdb224c1b5d
  Additional Information 3:    38ca
  Additional Information 4:    38ca0284a38a58e12c9e8fbc387895b3