Firefox automatically updated when I turned computer on - 9 Sept - but repeated attempts to start M'soft Outlook resulted in calendar screen showing for a second then Outlook crashed. Eudora email client crashed when attempting to send emails. Tried rebooting, but same result. On 10 Sept selected System Restore and restored to 8 Sept restore point, Outlook and Eudora now operate normally. Event viewer Application showed this for Eudora crash - Faulting application eudora.exe, version 6.2.3.4, faulting module ntdll.dll, version 5.1.2600.5755, fault address 0x00010a19. 0000: 41 70 70 6c 69 63 61 74 Applicat 0008: 69 6f 6e 20 46 61 69 6c ion Fail 0010: 75 72 65 20 20 65 75 64 ure eud 0018: 6f 72 61 2e 65 78 65 20 ora.exe 0020: 36 2e 32 2e 33 2e 34 20 6.2.3.4 0028: 69 6e 20 6e 74 64 6c 6c in ntdll 0030: 2e 64 6c 6c 20 35 2e 31 .dll 5.1 0038: 2e 32 36 30 30 2e 35 37 .2600.57 0040: 35 35 20 61 74 20 6f 66 55 at of 0048: 66 73 65 74 20 30 30 30 fset 000 0050: 31 30 61 31 39 0d 0a 10a19..