Hi, 

I have FSX Professional Edition, and yesterday I bought a SSD drive for my PC with Windows 10. The problem is, yesterday I tried to install FSX as a new program - since all what I had on my old HDD was deleted - and, after what seems a successfully installation, I tried to use it. But if I start a mission flight or I just click on "Free flight" in the top-left menu FSX crashes without any warning/error message.

So I tried to launch the Event Viewer, eventvwr.exe and it has reported an error. This is the report:

Register name: Application
Origin:       Application Error
Date:          05/07/2018 10:28:24
Event ID:     1000
Task category:(100)
Level:       Error
Keyword: Classic
User:        N/D
Computer:      DESKTOP-74I4JVP
Description:
Application name that generated the error: fsx.exe, version: 10.0.60905.0, timestamp: 0x44fd0a92
Module name that generated the error: API.DLL, version: 10.0.60905.0, timestamp: 0x44fd0f33
Exception code: 0xc0000005
Error Offset 0x0002c247
Process ID that generated the error: 0x1300
Application's start hour that generated the error: 0x01d414397ba0f124
Application's directory that generated the error: C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\fsx.exe
Module's directory that generated the error: C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\API.DLL
ID report: a03452fb-9dda-43db-b435-35fce12c06d8
Complete packet's name that generated the error: 
Application ID related to the packet that generated the error: 
XML event
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2018-07-05T08:28:24.086994700Z" />
    <EventRecordID>696</EventRecordID>
    <Channel>Application</Channel>
    <Computer>DESKTOP-74I4JVP</Computer>
    <Security />
  </System>
  <EventData>
    <Data>fsx.exe</Data>
    <Data>10.0.60905.0</Data>
    <Data>44fd0a92</Data>
    <Data>API.DLL</Data>
    <Data>10.0.60905.0</Data>
    <Data>44fd0f33</Data>
    <Data>c0000005</Data>
    <Data>0002c247</Data>
    <Data>1300</Data>
    <Data>01d414397ba0f124</Register name: Application
Origin:       Application Error
Date:          05/07/2018 10:28:24
Event ID:     1000
Task category:(100)
Level:       Error
Keyword: Classic
User:        N/D
Computer:      DESKTOP-74I4JVP
Description:
Application name that generated the error: fsx.exe, version: 10.0.60905.0, timestamp: 0x44fd0a92
Module name that generated the error: API.DLL, version: 10.0.60905.0, timestamp: 0x44fd0f33
Exception code: 0xc0000005
Error Offset 0x0002c247
Process ID that generated the error: 0x1300
Application's start hour that generated the error: 0x01d414397ba0f124
Application's directory that generated the error: C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\fsx.exe
Module's directory that generated the error: C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\API.DLL
ID report: a03452fb-9dda-43db-b435-35fce12c06d8
Complete packet's name that generated the error: 
Application ID related to the packet that generated the error: 
XML evento:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2018-07-05T08:43:20.490077600Z" />
    <EventRecordID>767</EventRecordID>
    <Channel>Application</Channel>
    <Computer>DESKTOP-74I4JVP</Computer>
    <Security />
  </System>
  <EventData>
    <Data>fsx.exe</Data>
    <Data>10.0.60905.0</Data>
    <Data>44fd0a92</Data>
    <Data>API.DLL</Data>
    <Data>10.0.60905.0</Data>
    <Data>44fd0f33</Data>
    <Data>c0000005</Data>
    <Data>0002c247</Data>
    <Data>39ec</Data>
    <Data>01d4143c0e04aafc</Data>
    <Data>C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\fsx.exe</Data>
    <Data>C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\API.DLL</Data>
    <Data>39516170-b62f-4d8e-bbf2-2443fb819997</Data>
    <Data>
    </Data>
    <Data>
    </Data>
  </EventData>
</Event>Data>
    <Data>C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\fsx.exe</Data>
    <Data>C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\API.DLL</Data>
    <Data>a03452fb-9dda-43db-b435-35fce12c06d8</Data>
    <Data>
    </Data>
    <Data>
    </Data>
  </EventData>
</Event>

 

I have translated the report manually from Italian, so I apologize if something is not like a report in English. Anyway, I hope this can help, because I'm worried I couldn't use FSX for a lot, lot of time.

Welcome to the AVSIM forums.

Here is some good reading about your API.dll crash:

 

On 7/5/2018 at 8:40 AM, Matteo Figini said:

<Data>fsx.exe</Data>
    <Data>10.0.60905.0</Data>

In your case you only have FSX Deluxe RTM Version installed so anything that requires SP1 or SP2/Acceleration will not run properly and you will get the API.dll error.