Random MoveFileEx failures on Vista (access denied, looks like caused by search indexer)

#include <windows.h>
#include <stdlib.h>
#include <stdio.h>

bool test() {
    unsigned char buf[] = {
        0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99,
        0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99
    };
    HANDLE h;
    DWORD nbytes;
    LPCTSTR fn_tmp = "aaa";
    LPCTSTR fn = "bbb";
    h = CreateFile(fn_tmp, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_ALWAYS, 0, 0);
    if (h == INVALID_HANDLE_VALUE) return 0;
    if (!WriteFile(h, buf, sizeof buf, &nbytes, 0)) goto error;
    if (!FlushFileBuffers(h)) goto error;
    if (!CloseHandle(h)) goto error;
    if (!MoveFileEx(fn_tmp, fn, MOVEFILE_REPLACE_EXISTING | MOVEFILE_COPY_ALLOWED | MOVEFILE_WRITE_THROUGH)) {
        printf("error=%dn", GetLastError());
        return 0;
    }
    return 1;
error:
    CloseHandle(h);
    return 0;
}

int main(int argc, char** argv) {
    unsigned int i;
    for (i = 0;; ++i) {
        printf("*%un", i);
        if (!test()) return 1;
    }
    return 0;
}