upgrade the OS to something supported
upgrade Oracle to something supported, at least 11gR2
Access violation usually mean the program is running out of memory.
But then, Oracle 10gR1 was desupported reallly many years ago.
As this forum is not a free support forum, you also shouldn't ask for a remedy here. Nobody here can do anything about it, other than to advise you you should upgrade.
Senior Oracle DBA
ORA-07445 is just like ORA-00600. Both mean
1) use the ora-00600/ora007445 lookup tool on My Oracle Support
2) if #1 fails, open an SR.
There is nothing anyone outside of oracle support can do for these two error codes. Any solution you find anywhere else could likely be fatal to your database.
If your database goes down in flames, you don't want your excuse to your IT director (or company CEO) to be "well, I read something on the web ..."
Open an SR with Oracle, if its a bug and it was fixed within the life time of 10.1 then there may be a patch, you will probably have to patch to the terminal release of 10.1.0.5, if there is no existing solution or workaround then you will need to upgrade to get a fix.