ntdll.dll driver error with executing applications  

Hello...

Can anybody please help me with the drivers problems im facing with. Sorry about my english and Im also not a computer expert but Ill tryy to explain a problem anyway.

Im working on a Toshiba Portege R830 laptoo with Win7 64 installed. 2 Days ago im started to reciving error msg on startup:
ConfiFree Task Tray Menu has stopped Working


Besides that Im also reciving an error msg when I try to run Sibelius notation software (its not a fresh installation):
Sibelius has stoped working

I figured out that problems are coused by driver ntdll.dll located in Windows subfolder winsxs (If i understood well this folder make an instances of the original driver so that different apllications can use it at the same time). In that folder i have 6 subfolders with instances of that driver.

I tried with common things: I reinstalled both softwares, checked if I made some new installations that day... so I deinstalled that too (Flash browser plugin upadate). Checked if windows upadets are up to date.

Has anyone expirience or solution for that problem? Is it possible to reinstall the drivers in some way. I would like to avoid fresh intstallation of the system becouse it takes lot of work and in the end I can came with the sam problem again. I would be very gratefull if someone can help me.

Here are logs of both errors:

ConfiFree Task Tray Menu has stopped Working
Problem signature:
Problem Event Name: APPCRASH
Application Name: NDSTray.exe
Application Version: 8.0.0.48
Application Timestamp: 4cf8869a
Fault Module Name: ntdll.dll
Fault Module Version: 6.1.7601.17725
Fault Module Timestamp: 4ec49b8f
Exception Code: c0000005
Exception Offset: 0002e066
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1060
Additional Information 1: 5c29
Additional Information 2: 5c29996e579b0e4041a88e81213bad19
Additional Information 3: c27c
Additional Information 4: c27c864fd4ed190d3724e0b9ded50687

Sibelius has stoped working
Problem signature:
Problem Event Name: APPCRASH
Application Name: Sibelius.exe
Application Version: 6.0.0.54
Application Timestamp: 49f85b3e
Fault Module Name: ntdll.dll
Fault Module Version: 6.1.7601.17725
Fault Module Timestamp: 4ec49b8f
Exception Code: c0000005
Exception Offset: 0002e066
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1060
Additional Information 1: 5c29
Additional Information 2: 5c29996e579b0e4041a88e81213bad19
Additional Information 3: c27c
Additional Information 4: c27c864fd4ed190d3724e0b9ded50687

Thans for help in advance.

Hi Pebbly..

Thank you for fast replay. I checked the links and followed the hints:

1st I updated all major hardware drivers for my Toshiba laptop
2nd I updated all hardware drivers (there were just few of them I had to update)
3th I folowed all steps from "About.com - How To Fix Ntdll.dll Errors" article except reinstaling an OS wich I want to avoid at all cost
4th I also did a memory check with integrated windows diagnostic tool.

But the problem still stays.

Has anyone have some other idea what could be the cause of the problem and how can I fix it?

Afeter trying few more things I suspected that some new hardware or software installation on my computer is making a conflict. Before that I used both softwares for few mounths with no problem.
But I dint conect any new hardware in period when error occured. Besides that I deinstalled fresh instalations (flash plugin for browser). So I decided to do full system scan for malware and viruses with few different softwares. With Sypbot Search and Destroy I founded a type op "Browse to save" malware. Couldnt delete instances of it in normal mode but managed to do so automaticly in safe mode. After SB deleted all instances of malware automaticly the things work again prefecly on reboot.

So the problem was "Barrowsoe2Save" wich coused some kind of conflict. Im also attaching an SB log.

I hope the infromation will be helpfull to someone with similar problems.