Windows installer fails for 8.1

I have installed successfully on one machine. Removed 8.0 and then
installed 8.1 ok

However the second machine fails.
Asks for the language and then halts.
If I kill process in task manager then installation resumes but then
fails completely with a "Chinese" user name. Computer is laptop with
locale = Australia and language = English.

Have included the last bit of the install log.

Note : have also just installed/removed pgAdmin and open office and they
were ok.

thanks as always.

Richard

MSI (c) (80:DC) [16:51:38:546]: Cloaking enabled.
MSI (c) (80:DC) [16:51:38:546]: Attempting to enable all disabled
priveleges before calling Install on Server
MSI (c) (80:DC) [16:51:38:546]: Connected to service for CA interface.
MSI (c) (80!7C) [16:51:39:265]: Note: 1: 2259 2:  3:  4:
MSI (c) (80:70) [16:51:39:906]: Leaked MSIHANDLE (3) of type 790540 for
thread 3964
MSI (c) (80:70) [16:51:39:906]: Note: 1: 2769 2: GetAvailableLocales 3: 1
MSI (c) (80:70) [16:51:39:906]: Note: 1: 2205 2:  3: Error
MSI (c) (80:70) [16:51:39:906]: Note: 1: 2228 2:  3: Error 4: SELECT
`Message` FROM `Error` WHERE `Error` = 2769
DEBUG: Error 2769:  Custom Action GetAvailableLocales did not close 1
MSIHANDLEs.
The installer has encountered an unexpected error installing this
package. This may indicate a problem with this package. The error code
is 2769. The arguments are: GetAvailableLocales, 1,
Action ended 16:51:39: GetAvailableLocales. Return value 1.
MSI (c) (80:88) [16:51:39:906]: Doing action: CheckAvailableDLLs
Action 16:51:39: CheckAvailableDLLs.