ora 27300 ora 27301 ora 27302

Hello every body
I got the following errors in my alert log

ORA-12518 TNS LISTENER COULD NOT HANDS OFF THE CLIENT CONNECTION

ORA-27300: OS system dependent operation:spcdr:9261:4200 failed with status: 997
ORA-27301: OS failure message: Overlapped I/O operation is in progress.
ORA-27302: failure occurred at: skgpspawn


Oracle 10g 10.2.0.4
windows 2003 server RELEASE2

RAM SIZE :8GB
DEDICATED SERVER


PLEASE ANYBODY CAN SHARE U R IDEAS...

THANKS IN ADVANCE,
VIJAY

Just a couple of follow up questions...

1- How many of these errors are you getting?
2- For how long has being up-and-running the affected Oracle instance?
3- For how long has being up-and-running the affected Windows system?
4- When error started to pop-up?... since the day you started up the instance? after 1 year?
5- Is quantity of errors increasing over time?
6- Are users/processes being noticiable affected by the issue?